mesosaurs

He is of a generation sufficiently divorced from the old pulps that he’s the dolphin among mesosaurs here.

Boing Boing: January 4, 2004 - January 10, 2004 Archives 2004

The gigantic ichthyosaurs, mesosaurs, and dinosaurs held dominion over the sea and land, and the monster flying reptile, the pterodactyl, over the air.

Wealth of the World's Waste Places and Oceania Jewett Castello Gilson

Thus, all the giant reptiles died out -- the dinosaurs, the mesosaurs -- but the reptilian impulse still survives.

Time and Change John Burroughs 1879